quite easy as you can see the gears
http://www.torsen.com/files/Torsen%20T-1%20Technical%20Sheet.pdf
http://www.torsen.com/files/Torsen%20T-2%20Technical%20Sheet.pdf
Here is a little something which one of the locals up here built.
He was a bit apprehensive about getting a home built chassis past the authorities so he imported one from England. Mechanicals are Citroen 2CV . It is registered as a motorbike
so cheaper rego and insurance. Wears a crash hat...
I was ok although there was a bit of panic (by my wife mainly) when the radio reports suggested evacuating the low lying areas of the suburb where we live.
Where I work I look out at a creek which comes up quite quickly when there is a sudden downpour or a lot of rain over a period. See...
If a list was made by people who own 1UZ powered vehicles and they knew the build dates of their vehicles this would probably give a good indication as to where the engine numbers fit by dates.
For example
I had a Majesta half cut
frame number UZS141-0003816
from this list build date is...
If you put up some pictures of your motor we can identify it. Include pics of top of motor left side of motor showing oil filter and one of plugs for ecu